@article{Oros:95033,
      author        = "Oros, D. and Ruiz-Martinez, S. and Staines-Urias, E. and
                       Conde-Agudelo, A. and Villar, J. and Fabre, E. and
                       Papageorghiou, A.T.",
      title         = "{Reference ranges for Doppler indices of umbilical and
                       fetal middle cerebral arteries and cerebroplacental ratio:
                       systematic review}",
      year          = "2019",
}